text: /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
   * Copyright by The HDF Group.                                               *
   * Copyright by the Board of Trustees of the University of Illinois.         *
   * All rights reserved.                                                      *
   *                                                                           *
   * This file is part of HDF5.  The full HDF5 copyright notice, including     *
   * terms governing use, modification, and redistribution, is contained in    *
   * the COPYING file, which can be found at the root of the source code       *
   * distribution tree, or in https://www.hdfgroup.org/licenses.               *
   * If you do not have access to either file, you may request a copy from     *
   * help@hdfgroup.org.                                                        *
   * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
  
  /*-------------------------------------------------------------------------
   *
   * Created:             H5Olinfo.c
   *                      Aug 23 2005
   *                      Quincey Koziol
   *
   * Purpose:             Link Information messages.
   *
   *-------------------------------------------------------------------------
   */
  
  #define H5G_FRIEND     /*suppress error about including H5Gpkg   */
  #define H5L_FRIEND     /*suppress error about including H5Lpkg	  */
  #include "H5Omodule.h" /* This source code file is part of the H5O module */
  
  #include "H5private.h"   /* Generic Functions			*/
  #include "H5Eprivate.h"  /* Error handling		  	*/
  #include "H5FLprivate.h" /* Free lists                           */
  #include "H5Gpkg.h"      /* Groups		  		*/
  #include "H5Lpkg.h"      /* Links                                */
  #include "H5Opkg.h"      /* Object headers			*/
  
  /* PRIVATE PROTOTYPES */
  static void * H5O__linfo_decode(H5F_t *f, H5O_t *open_oh, unsigned mesg_flags, unsigned *ioflags,
                                  size_t p_size, const uint8_t *p);
  static herr_t H5O__linfo_encode(H5F_t *f, hbool_t disable_shared, uint8_t *p, const void *_mesg);
  static void * H5O__linfo_copy(const void *_mesg, void *_dest);
  static size_t H5O__linfo_size(const H5F_t *f, hbool_t disable_shared, const void *_mesg);
  static herr_t H5O__linfo_free(void *_mesg);
  static herr_t H5O__linfo_delete(H5F_t *f, H5O_t *open_oh, void *_mesg);
  static void *H5O__linfo_copy_file(H5F_t *file_src, void *native_src, H5F_t *file_dst, hbool_t *recompute_size,
                                    unsigned *mesg_flags, H5O_copy_t *cpy_info, void *udata);
  static herr_t H5O__linfo_post_copy_file(const H5O_loc_t *parent_src_oloc, const void *mesg_src,
                                          H5O_loc_t *dst_oloc, void *mesg_dst, unsigned *mesg_flags,
                                          H5O_copy_t *cpy_info);
  static herr_t H5O__linfo_debug(H5F_t *f, const void *_mesg, FILE *stream, int indent, int fwidth);
  
  /* This message derives from H5O message class */
  const H5O_msg_class_t H5O_MSG_LINFO[1] = {{
      H5O_LINFO_ID,              /*message id number             */
      "linfo",                   /*message name for debugging    */
      sizeof(H5O_linfo_t),       /*native message size           */
      0,                         /* messages are shareable?       */
      H5O__linfo_decode,         /*decode message                */
      H5O__linfo_encode,         /*encode message                */
      H5O__linfo_copy,           /*copy the native value         */
      H5O__linfo_size,           /*size of symbol table entry    */
      NULL,                      /*default reset method          */
      H5O__linfo_free,           /* free method			*/
      H5O__linfo_delete,         /* file delete method		*/
      NULL,                      /* link method			*/
      NULL,                      /*set share method		*/
      NULL,                      /*can share method		*/
      NULL,                      /* pre copy native value to file */
      H5O__linfo_copy_file,      /* copy native value to file    */
      H5O__linfo_post_copy_file, /* post copy native value to file */
      NULL,                      /* get creation index		*/
      NULL,                      /* set creation index		*/
      H5O__linfo_debug           /*debug the message             */
  }};
  
  /* Current version of link info information */
  #define H5O_LINFO_VERSION 0
  
  /* Flags for link info index flag encoding */
  #define H5O_LINFO_TRACK_CORDER 0x01
  #define H5O_LINFO_INDEX_CORDER 0x02
  #define H5O_LINFO_ALL_FLAGS    (H5O_LINFO_TRACK_CORDER | H5O_LINFO_INDEX_CORDER)
  
  /* Data exchange structure to use when copying links from src to dst */
  typedef struct {
      const H5O_loc_t *src_oloc;  /* Source object location */
      H5O_loc_t *      dst_oloc;  /* Destination object location */
      H5O_linfo_t *    dst_linfo; /* Destination object's link info message */
      H5O_copy_t *     cpy_info;  /* Information for copy operation */
  } H5O_linfo_postcopy_ud_t;
  
  /* Declare a free list to manage the H5O_linfo_t struct */
  H5FL_DEFINE_STATIC(H5O_linfo_t);
  
  /*-------------------------------------------------------------------------
   * Function:    H5O__linfo_decode
   *
   * Purpose:     Decode a message and return a pointer to a newly allocated one.
   *
   * Return:      Success:        Ptr to new message in native form.
   *              Failure:        NULL
   *
   * Programmer:  Quincey Koziol
   *              Aug 23 2005
   *
   *-------------------------------------------------------------------------
   */
  static void *
  H5O__linfo_decode(H5F_t *f, H5O_t H5_ATTR_UNUSED *open_oh, unsigned H5_ATTR_UNUSED mesg_flags,
                    unsigned H5_ATTR_UNUSED *ioflags, size_t H5_ATTR_UNUSED p_size, const uint8_t *p)
  {
      H5O_linfo_t * linfo = NULL;     /* Link info */
      unsigned char index_flags;      /* Flags for encoding link index info */
      void *        ret_value = NULL; /* Return value */
  
      FUNC_ENTER_PACKAGE
  
      /* check args */
      HDassert(f);
      HDassert(p);
  
      /* Version of message */
      if (*p++ != H5O_LINFO_VERSION)
          HGOTO_ERROR(H5E_OHDR, H5E_CANTLOAD, NULL, "bad version number for message")
  
      /* Allocate space for message */
      if (NULL == (linfo = H5FL_MALLOC(H5O_linfo_t)))
          HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed")
  
      /* Get the index flags for the group */
      index_flags = *p++;
      if (index_flags & ~H5O_LINFO_ALL_FLAGS)
          HGOTO_ERROR(H5E_OHDR, H5E_CANTLOAD, NULL, "bad flag value for message")
      linfo->track_corder = (index_flags & H5O_LINFO_TRACK_CORDER) ? TRUE : FALSE;
      linfo->index_corder = (index_flags & H5O_LINFO_INDEX_CORDER) ? TRUE : FALSE;
  
      /* Set the number of links in the group to an invalid value, so we query it later */
      linfo->nlinks = HSIZET_MAX;
  
      /* Max. link creation order value for the group, if tracked */
      if (linfo->track_corder)
          INT64DECODE(p, linfo->max_corder)
      else
          linfo->max_corder = 0;
  
      /* Address of fractal heap to store "dense" links */
      H5F_addr_decode(f, &p, &(linfo->fheap_addr));
  
      /* Address of v2 B-tree to index names of links (names are always indexed) */
      H5F_addr_decode(f, &p, &(linfo->name_bt2_addr));
  
      /* Address of v2 B-tree to index creation order of links, if there is one */
      if (linfo->index_corder)
          H5F_addr_decode(f, &p, &(linfo->corder_bt2_addr));
      else
          linfo->corder_bt2_addr = HADDR_UNDEF;
  
      /* Set return value */
      ret_value = linfo;
  
  done:
      if (ret_value == NULL)
          if (linfo != NULL)
              linfo = H5FL_FREE(H5O_linfo_t, linfo);
  
      FUNC_LEAVE_NOAPI(ret_value)
  } /* end H5O__linfo_decode() */
  
  /*-------------------------------------------------------------------------
   * Function:    H5O__linfo_encode
   *
   * Purpose:     Encodes a message.
   *
   * Return:      Non-negative on success/Negative on failure
   *
   * Programmer:  Quincey Koziol
   *              Aug 23 2005
   *
   *-------------------------------------------------------------------------
   */
  static herr_t
  H5O__linfo_encode(H5F_t *f, hbool_t H5_ATTR_UNUSED disable_shared, uint8_t *p, const void *_mesg)
  {
      const H5O_linfo_t *linfo = (const H5O_linfo_t *)_mesg;
      unsigned char      index_flags; /* Flags for encoding link index info */
  
      FUNC_ENTER_PACKAGE_NOERR
  
      /* check args */
      HDassert(f);
      HDassert(p);
      HDassert(linfo);
  
      /* Message version */
      *p++ = H5O_LINFO_VERSION;
  
      /* The flags for the link indices */
      index_flags = (uint8_t)(linfo->track_corder ? H5O_LINFO_TRACK_CORDER : 0);
      index_flags = (uint8_t)(index_flags | (linfo->index_corder ? H5O_LINFO_INDEX_CORDER : 0));
      *p++        = index_flags;
  
      /* Max. link creation order value for the group, if tracked */
      if (linfo->track_corder)
          INT64ENCODE(p, linfo->max_corder)
  
      /* Address of fractal heap to store "dense" links */
      H5F_addr_encode(f, &p, linfo->fheap_addr);
  
      /* Address of v2 B-tree to index names of links */
      H5F_addr_encode(f, &p, linfo->name_bt2_addr);
  
      /* Address of v2 B-tree to index creation order of links, if they are indexed */
      if (linfo->index_corder)
          H5F_addr_encode(f, &p, linfo->corder_bt2_addr);
      else
          HDassert(!H5F_addr_defined(linfo->corder_bt2_addr));
  
      FUNC_LEAVE_NOAPI(SUCCEED)
  } /* end H5O__linfo_encode() */
  
  /*-------------------------------------------------------------------------
   * Function:    H5O__linfo_copy
   *
   * Purpose:     Copies a message from _MESG to _DEST, allocating _DEST if
   *              necessary.
   *
   * Return:      Success:        Ptr to _DEST
   *              Failure:        NULL
   *
   * Programmer:  Quincey Koziol
   *              Aug 23 2005
   *
   *-------------------------------------------------------------------------
   */
  static void *
  H5O__linfo_copy(const void *_mesg, void *_dest)
  {
      const H5O_linfo_t *linfo     = (const H5O_linfo_t *)_mesg;
      H5O_linfo_t *      dest      = (H5O_linfo_t *)_dest;
      void *             ret_value = NULL; /* Return value */
  
      FUNC_ENTER_PACKAGE
  
      /* check args */
      HDassert(linfo);
      if (!dest && NULL == (dest = H5FL_MALLOC(H5O_linfo_t)))
          HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed")
  
      /* copy */
      *dest = *linfo;
  
      /* Set return value */
      ret_value = dest;
  
  done:
      FUNC_LEAVE_NOAPI(ret_value)
  } /* end H5O__linfo_copy() */
  
  /*-------------------------------------------------------------------------
   * Function:    H5O__linfo_size
   *
   * Purpose:     Returns the size of the raw message in bytes not counting
   *              the message type or size fields, but only the data fields.
   *              This function doesn't take into account alignment.
   *
   * Return:      Success:        Message data size in bytes without alignment.
   *              Failure:        zero
   *
   * Programmer:  Quincey Koziol
   *              Aug 23 2005
   *
   *-------------------------------------------------------------------------
   */
  static size_t
  H5O__linfo_size(const H5F_t *f, hbool_t H5_ATTR_UNUSED disable_shared, const void *_mesg)
  {
      const H5O_linfo_t *linfo     = (const H5O_linfo_t *)_mesg;
      size_t             ret_value = 0; /* Return value */
  
      FUNC_ENTER_PACKAGE_NOERR
  
      /* Set return value */
      ret_value =
          1                                       /* Version */
          + 1                                     /* Index flags */
          + (linfo->track_corder ? (size_t)8 : 0) /* Curr. max. creation order value */
          + (size_t)H5F_SIZEOF_ADDR(f)            /* Address of fractal heap to store "dense" links */
          + (size_t)H5F_SIZEOF_ADDR(f)            /* Address of v2 B-tree for indexing names of links */
          + (linfo->index_corder ? (size_t)H5F_SIZEOF_ADDR(f)
                                 : 0); /* Address of v2 B-tree for indexing creation order values of links */
  
      FUNC_LEAVE_NOAPI(ret_value)
  } /* end H5O__linfo_size() */
  
  /*-------------------------------------------------------------------------
   * Function:	H5O__linfo_free
   *
   * Purpose:	Frees the message
   *
   * Return:	Non-negative on success/Negative on failure
   *
   * Programmer:	Quincey Koziol
   *              Tuesday, August 23, 2005
   *
   *-------------------------------------------------------------------------
   */
  static herr_t
  H5O__linfo_free(void *mesg)
  {
      FUNC_ENTER_PACKAGE_NOERR
  
      HDassert(mesg);
  
      mesg = H5FL_FREE(H5O_linfo_t, mesg);
  
      FUNC_LEAVE_NOAPI(SUCCEED)
  } /* end H5O__linfo_free() */
  
  /*-------------------------------------------------------------------------
   * Function:    H5O__linfo_delete
   *
   * Purpose:     Free file space referenced by message
   *
   * Return:      Non-negative on success/Negative on failure
   *
   * Programmer:  Quincey Koziol
   *              Saturday, September 16, 2006
   *
   *-------------------------------------------------------------------------
   */
  static herr_t
  H5O__linfo_delete(H5F_t *f, H5O_t H5_ATTR_UNUSED *open_oh, void *_mesg)
  {
      H5O_linfo_t *linfo     = (H5O_linfo_t *)_mesg;
      herr_t       ret_value = SUCCEED; /* Return value */
  
      FUNC_ENTER_PACKAGE
  
      /* check args */
      HDassert(f);
      HDassert(linfo);
  
      /* If the group is using "dense" link storage, delete it */
      if (H5F_addr_defined(linfo->fheap_addr))
          if (H5G__dense_delete(f, linfo, TRUE) < 0)
              HGOTO_ERROR(H5E_OHDR, H5E_CANTFREE, FAIL, "unable to free dense link storage")
  
  done:
      FUNC_LEAVE_NOAPI(ret_value)
  } /* end H5O__linfo_delete() */
  
  /*-------------------------------------------------------------------------
   * Function:    H5O__linfo_copy_file
   *
   * Purpose:     Copies a message from _MESG to _DEST in file
   *
   * Return:      Success:        Ptr to _DEST
   *
   *              Failure:        NULL
   *
   * Programmer:  Quincey Koziol
   *              June 26, 2006
   *
   *-------------------------------------------------------------------------
   */
  static void *
  H5O__linfo_copy_file(H5F_t H5_ATTR_UNUSED *file_src, void *native_src, H5F_t *file_dst,
                       hbool_t H5_ATTR_UNUSED *recompute_size, unsigned H5_ATTR_UNUSED *mesg_flags,
                       H5O_copy_t *cpy_info, void *_udata)
  {
      H5O_linfo_t *       linfo_src = (H5O_linfo_t *)native_src;
      H5O_linfo_t *       linfo_dst = NULL;
      H5G_copy_file_ud_t *udata     = (H5G_copy_file_ud_t *)_udata;
      void *              ret_value = NULL; /* Return value */
  
      FUNC_ENTER_PACKAGE_TAG(H5AC__COPIED_TAG)
  
      /* check args */
      HDassert(linfo_src);
      HDassert(cpy_info);
  
      /* Copy the source message */
      if (NULL == (linfo_dst = (H5O_linfo_t *)H5O__linfo_copy(linfo_src, NULL)))
          HGOTO_ERROR(H5E_OHDR, H5E_CANTCOPY, NULL, "memory allocation failed")
  
      /* If we are performing a 'shallow hierarchy' copy, and the links in this
       *  group won't be included in the destination, reset the link info for
       *  this group.
       */
      if (cpy_info->max_depth >= 0 && cpy_info->curr_depth >= cpy_info->max_depth) {
          linfo_dst->nlinks          = 0;
          linfo_dst->max_corder      = 0;
          linfo_dst->fheap_addr      = HADDR_UNDEF;
          linfo_dst->name_bt2_addr   = HADDR_UNDEF;
          linfo_dst->corder_bt2_addr = HADDR_UNDEF;
      } /* end if */
      else {
          /* Create the components of the dense link storage for the destination group */
          /* (XXX: should probably get the "creation" parameters for the source group's
           *      dense link storage components and use those - QAK)
           */
          if (H5F_addr_defined(linfo_src->fheap_addr)) {
              /* Create the dense link storage */
              if (H5G__dense_create(file_dst, linfo_dst, udata->common.src_pline) < 0)
                  HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, NULL, "unable to create 'dense' form of new format group")
          } /* end if */
      }     /* end else */
  
      /* Set return value */
      ret_value = linfo_dst;
  
  done:
      if (!ret_value)
          if (linfo_dst)
              linfo_dst = H5FL_FREE(H5O_linfo_t, linfo_dst);
  
      FUNC_LEAVE_NOAPI_TAG(ret_value)
  } /* H5O__linfo_copy_file() */
  
  /*-------------------------------------------------------------------------
   * Function:	H5O__linfo_post_copy_file_cb
   *
   * Purpose:	Callback routine for copying links from src to dst file
   *              during "post copy" routine
   *
   * Return:	Success:        Non-negative
   *		Failure:	Negative
   *
   * Programmer:	Quincey Koziol
   *		Sept 26 2006
   *
   *-------------------------------------------------------------------------
   */
  static herr_t
  H5O__linfo_post_copy_file_cb(const H5O_link_t *src_lnk, void *_udata)
  {
      H5O_linfo_postcopy_ud_t *udata = (H5O_linfo_postcopy_ud_t *)_udata; /* 'User data' passed in */
      H5O_link_t               dst_lnk;                                   /* Destination link to insert */
      hbool_t                  dst_lnk_init = FALSE;        /* Whether the destination link is initialized */
      herr_t                   ret_value    = H5_ITER_CONT; /* Return value */
  
      FUNC_ENTER_PACKAGE
  
      /* Check arguments */
      HDassert(src_lnk);
      HDassert(udata);
  
      /* Copy the link (and the object it points to) */
      if (H5L__link_copy_file(udata->dst_oloc->file, src_lnk, udata->src_oloc, &dst_lnk, udata->cpy_info) < 0)
          HGOTO_ERROR(H5E_OHDR, H5E_CANTCOPY, H5_ITER_ERROR, "unable to copy link")
      dst_lnk_init = TRUE;
  
      /* Set metadata tag in API context */
      H5_BEGIN_TAG(H5AC__COPIED_TAG);
  
      /* Insert the new object in the destination file's group */
      /* (Doesn't increment the link count - that's already been taken care of for hard links) */
      if (H5G__dense_insert(udata->dst_oloc->file, udata->dst_linfo, &dst_lnk) < 0)
          HGOTO_ERROR_TAG(H5E_OHDR, H5E_CANTINSERT, H5_ITER_ERROR, "unable to insert destination link")
  
      /* Reset metadata tag in API context */
      H5_END_TAG
  
  done:
      /* Check if the destination link has been initialized */
      if (dst_lnk_init)
          H5O_msg_reset(H5O_LINK_ID, &dst_lnk);
  
      FUNC_LEAVE_NOAPI(ret_value)
  } /* end H5O__linfo_post_copy_file_cb() */
  
  /*-------------------------------------------------------------------------
   * Function:    H5O__linfo_post_copy_file
   *
   * Purpose:     Finish copying a message from between files
   *
   * Return:      Non-negative on success/Negative on failure
   *
   * Programmer:  Quincey Koziol
   *              September 26, 2005
   *
   *-------------------------------------------------------------------------
   */
  static herr_t
  H5O__linfo_post_copy_file(const H5O_loc_t *src_oloc, const void *mesg_src, H5O_loc_t *dst_oloc,
                            void *mesg_dst, unsigned H5_ATTR_UNUSED *mesg_flags, H5O_copy_t *cpy_info)
  {
      const H5O_linfo_t *linfo_src = (const H5O_linfo_t *)mesg_src;
      H5O_linfo_t *      linfo_dst = (H5O_linfo_t *)mesg_dst;
      herr_t             ret_value = SUCCEED; /* Return value */
  
      FUNC_ENTER_PACKAGE
  
      /* check args */
      HDassert(src_oloc && src_oloc->file);
      HDassert(linfo_src);
      HDassert(dst_oloc && dst_oloc->file);
      HDassert(H5F_addr_defined(dst_oloc->addr));
      HDassert(linfo_dst);
      HDassert(cpy_info);
  
      /* If we are performing a 'shallow hierarchy' copy, get out now */
      if (cpy_info->max_depth >= 0 && cpy_info->curr_depth >= cpy_info->max_depth)
          HGOTO_DONE(SUCCEED)
  
      /* Check for copying dense link storage */
      if (H5F_addr_defined(linfo_src->fheap_addr)) {
          H5O_linfo_postcopy_ud_t udata; /* User data for iteration callback */
  
          /* Set up dense link iteration user data */
          udata.src_oloc  = src_oloc;
          udata.dst_oloc  = dst_oloc;
          udata.dst_linfo = linfo_dst;
          udata.cpy_info  = cpy_info;
  
          /* Iterate over the links in the group, building a table of the link messages */
          if (H5G__dense_iterate(src_oloc->file, linfo_src, H5_INDEX_NAME, H5_ITER_NATIVE, (hsize_t)0, NULL,
                                 H5O__linfo_post_copy_file_cb, &udata) < 0)
              HGOTO_ERROR(H5E_SYM, H5E_CANTNEXT, FAIL, "error iterating over links")
      } /* end if */
  
  done:
      FUNC_LEAVE_NOAPI(ret_value)
  } /* H5O__linfo_post_copy_file() */
  
  /*-------------------------------------------------------------------------
   * Function:    H5O__linfo_debug
   *
   * Purpose:     Prints debugging info for a message.
   *
   * Return:      Non-negative on success/Negative on failure
   *
   * Programmer:  Quincey Koziol
   *              Aug 23 2005
   *
   *-------------------------------------------------------------------------
   */
  static herr_t
  H5O__linfo_debug(H5F_t H5_ATTR_UNUSED *f, const void *_mesg, FILE *stream, int indent, int fwidth)
  {
      const H5O_linfo_t *linfo = (const H5O_linfo_t *)_mesg;
  
      FUNC_ENTER_PACKAGE_NOERR
  
      /* check args */
      HDassert(f);
      HDassert(linfo);
      HDassert(stream);
      HDassert(indent >= 0);
      HDassert(fwidth >= 0);
  
      HDfprintf(stream, "%*s%-*s %s\n", indent, "", fwidth,
                "Track creation order of links:", linfo->track_corder ? "TRUE" : "FALSE");
      HDfprintf(stream, "%*s%-*s %s\n", indent, "", fwidth,
                "Index creation order of links:", linfo->index_corder ? "TRUE" : "FALSE");
      HDfprintf(stream, "%*s%-*s %" PRIuHSIZE "\n", indent, "", fwidth, "Number of links:", linfo->nlinks);
      HDfprintf(stream, "%*s%-*s %" PRId64 "\n", indent, "", fwidth,
                "Max. creation order value:", linfo->max_corder);
      HDfprintf(stream, "%*s%-*s %" PRIuHADDR "\n", indent, "", fwidth,
                "'Dense' link storage fractal heap address:", linfo->fheap_addr);
      HDfprintf(stream, "%*s%-*s %" PRIuHADDR "\n", indent, "", fwidth,
                "'Dense' link storage name index v2 B-tree address:", linfo->name_bt2_addr);
      HDfprintf(stream, "%*s%-*s %" PRIuHADDR "\n", indent, "", fwidth,
                "'Dense' link storage creation order index v2 B-tree address:", linfo->corder_bt2_addr);
  
      FUNC_LEAVE_NOAPI(SUCCEED)
  } /* end H5O__linfo_debug() */
  